I'm using: totem 0.99.0-2 and libxine 1-beta12.

I found a reproducable hang in totem when I move around the Properties
window while playing a video.

Steps to reproduce:

1) Play any video (audio does not trigger bug).
2) Select Movie->Properties.
3) Grab the Properties window and move it around on top of totem.

Result:
This following message is printed in the console where I stated totem, and
totem locks up:

Xlib: unexpected async reply (sequence 0x349)!

The hang is fully reproducable here. The sequence number varies. I googled
for this error, and it sounds like this person had the same problem with
his GNOME program:

http://mail.gnome.org/archives/gtk-app-devel-list/2003-May/msg00038.html